What is the typical result of having a left bundle branch block (LBBB)?

Having a left bundle branch block (LBBB) typically results in a delay in electrical conduction through the left bundle branch of the heart's conduction system. This block occurs when there is an interruption or delay in the electrical impulses that travel through the left bundle branch, which is responsible for conducting impulses to the left ventricle.

This delay leads to the left ventricle being activated later than the right ventricle, which can result in a typical pattern observed on an electrocardiogram (ECG). The altered conduction can affect the overall coherence of heart muscle contraction but does not inherently lead to a faster heart rate, a decrease in heart output, or a complete blockage of heart signals. Therefore, recognizing that the hallmark result of LBBB is this conduction delay helps in understanding how this condition affects cardiac function.